mitigate
verb [ T ] formal uk/ˈmɪt.ɪ.ɡeɪt/ us/ˈmɪt̬.ə.ɡeɪt/
使缓和；减轻（危害等）
to make something less harmful, unpleasant, or bad
It is unclear how to mitigate the effects of tourism on the island. 还不清楚如何缓解旅游业对这个岛屿的影响。
Compare: extenuate